Tiêu đề 13. PHOTOSYNTHESIS IN HIGHER PLANTS.pdf ✅

PAPER 1 (1.) Choose the correct option according to given figure: (1) A - Primary acceptor, B - Reaction center, C-Pigment molecules. (2) A -Primary acceptor, B- Reaction center, C - Photon (3) A-Photon, B-Pigment molecules, C-Reaction centre (4) A - Reaction center, B - Primary acceptor, C-Pigment molecules (2.) Photosynthesis is more in: (1) Orange light (2) Green light (3) Blue light (4) Yellow light (3.) As compared to a C3 plant how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by maize : (1) Two (2) Six (3) Zero (4) Twelve (4.) During photosynthesis electrons are continuously lost from the reaction centre of PSII. What source is used to replace these electrons: (1) Sunlight (2) O2 (3) HO2 (4) O3 (5.) The electron flow from PSII to NADP via ETS and PSI follows (1) Uphill → Downhill → Uphill → Downhill (2) Downhill → Uphill → Downhill → Uphill (3) Downhill → Uphill → Uphill → Downhill (4) Uphill → Downhill → Downhill → Uphill (6.) Which statement is false : (1) H S2 , not HO2 is involved in photosynthesis of purple sulphur bacteria (2) Light reactions are stopped in the absence of light (3) Calvin cycle occurs in the grana of chloroplast (4) ATP is produced during light reaction via chemiosmosis (7.) Stromal lamellae lack (1) PSII (2) PSI (3) NADP reductase (4) Both 1 and 3
(8.) A process that makes important difference between C3 and C4 plants is: (1) Transpiration (2) Glycolysis (3) Photosynthesis (4) Photorespiration (9.) Study the pathway ATP synthesis through chemiosmosis given below: In which of the following options correct for all the four blanks A, B, C and D are indicated. (1) A-F, B-Thylakoid membrane, C-Photosystem (I), D-Photosystem (II) (2) A-F, B-Thylakoid membrane, C-Photosystem (I), D-Photosystem (II) (3) A-F F1 , B-Thylakoid membrane, C-Photosystem (II), D-Photosystem (I) (4) A-F, B-Thylakoid membrane, C-Photosystem (II), D-Photosystem (I) (10.) Which statement is incorrect : (1) The C3 and C4 plants respond similarly to CO2 concentration (2) At low light conditions, neither C3 nor C4 plants respond to high CO2 concentration (3) C4 plants attain saturation at much lower CO2 concentration (about 1 360 II  − ) than C3 plants (about 1 450 II  − ) (4) Current availability of CO2 levels is limiting to the C3 plants (11.) Which statement are true for photosynthesis : (1) CO2 reduction occur in dark reaction (2) HO2 oxidation occur in light reaction (3) Dark reaction is an enzymatic phase of photosynthesis (4) All of these (12.) Kranz anatomy is related with : (1) C4 pathway (2) C3 cycle (3) C2 cycle (4) CAM cycle (13.) Which of the following factors not affects photosynthesis (1) number, size, age and orientation of leaves (2) mesophyll cells and chromoplast
(3) internal CO concentration and amount of chlorophyll (4) 2 and 3 (14.) Splitting of water in photosynthesis is called : (1) Dark reaction (2) Photolysis (3) Electron transfer (4) Phototropism (15.) Which of the following are produced by reactions that take place in the thylakoids and consumed by reactions in the stroma : (1) CO2 and HO2 (2) NADP+ and ADP (3) ATP and NADPH (4) Glucose and O2 (16.) The first electron carrier molecule in the chain from P700 to NADP + is believed to be an : (1) Iron protein (2) Iron magnesium protein (3) Iron sulphur protein (4) Iron copper protein (17.) In the initial fixation of CO2 in C4 plants : (1) CO2 reacts with PGA (2) CO2 reacts with PEPA (3) CO2 reacts with RuBP (4) CO2 reacts with RuMP (18.) In pigment system II electrons from excited P680 accepted by : (1) Phaeophytin (2) Plastocyanin (3) Plastoquinone (4) AFeS (19.) Cyclic photophosphorylation produces : (1) NADPH (2) ATP and NADPH (3) ATP, NADPH and O2 (4) ATP only (20.) When O2 binds to RuBisCO the products in Calvin cycle is (1) 2 Phosphoglycerate molecules (2) 2 phosphoglycolate molecules (3) One phosphoglycerate and one phosphoglycolate molecule (4) 1 Phosphoglyceraldehyde molecules (21.) Which pigment system immediately donates e − for the reduction of NADP (1) PS II (2) PS I (3) CO2 (4) Plastoquinone (22.) In addition to the 12 molecules of NADP2 the energy required for the synthesis of one mole of hexose by C3 and C4 pathway is : (1) 18 molecules of ATP (2) 30 molecules of ATP
(3) 18&30 molecules of ATP respectively (4) 30&18 molecules of ATP respectively (23.) The remarkable feature of photosynthesis is : (1) Light energy is converted into chemical energy (2) Formation of sugars from formaldehyde (3) Formation of chlorophyll from inorganic salts (4) Oxidation of chlorophyll (24.) ATP: NADPH :CO 2 2 consumption ratio during the photosynthesis in the C3 plant : (1) 3: 2:1 (2) 1: 2:3 (3) 2:3:1 (4) 1: 2: 4 (25.) The enzyme that not found in C3 cycle : (1) PEP carboxylase (2) RuBp carboxylase (3) NADP reductase (4) ATP synthase (26.) Reaction centre of the photo system of photosynthesis forms by : (1) Single molecule of chlorophyll b (2) Single molecule of chlorophyll a (3) Chlorophyll b and Xanthophyll (4) Xanthophyll and carotenoid (27.) Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : In C4 plants photorespiration does not occur. Reason (R) : C4 plants have a machanism that increase the concentration of CO2 at the enzyme site. choose the correct answer from the options given below : (1) Both (A) and (R) are correct but (R) is not the correct explanation of (A) (2) (A) is correct but (R) is not correct (3) (A) is not correct but (R) is correct (4) Both (A) and (R) are correct and (R) is the correct explanation of (A) (28.) At high light intensities : (1) C3 plants show increase in photosynthesis and C4 show no effect (2) C4 plants show increase in photosynthesis and C3 show no effect (3) In both C3 and C4 plants shows increase rate of photosynthesis (4) Phtosynthesis is not dependant on the intensities of light. (29.) Which statement (s) is/are true : (1) Dark reaction is more temperature sensitive than light reaction